Vacuum evaporating apparatus.



G. STADE.

"VACUUM EVAPORATING APPARATUS.

APPLICATION FILED MAR. 29. T913.

Patented 1.111.111,1916. A

2 SHEETS-SHEET I.

G. STADE. VACUUM EVAPORATING APPARATUS. APPLICATION man f1/m29, 1913.

3191689758. Patented. Jan. 18, 3.916.

2 SHEETS-SHEET 2.

27 f/z/L/ and intermixed vapor are directed to and CII travel upwardly in, the central or relatively hottest parts ot the chamber 1 and the cooler and heavier fluid, from which the vapor has separated and been conducted away to the condenser, is directed to and travel downwardly at and near the periphery or relatively cooler portions of the chamber 1. The ascending hot fluid and vapor are also gathered together substantially into a single stream or current and travel upwardly together, and thel heavier downwardly descending fluid travels downwardly separately therefrom and outside thereof. r1`he further great advantage is secured that the hot ascending currents and the cooler descending currents do not meet or impinge upon each other thus is avoided by interlerence with or balliing oi each by the other, whereby the circulation would be impaired or stopped at important or necessary points, thereby impairing the evaporating efticiency of the device and I iullit'ying a great part of the momentum energy derived from the heating apparatus.

Suitable heating devices are provided and in the embodied form said heating devices are provided near the bottom of the chamber 1 with a passage or passages between the side wallsl of the chamber 1 andthe heating device 15 and also between the bottom otl the chamber 1 and the bottom of said heating device. Said embodied form of heating Vdevice comprises an inverted conoidal device having a bottom plate 16 and a top plate 17 of substantially the same shape and form and having a peripheral side wall 18 shown substantially vertical, and with the apex at the central part with an opening 19 therethrough.

The heating device is provided with aseries of tubes 21 extending between the bottom 16 and the top 17 providing passageways through the heating device 'for the liquid to be evaporated lnlets 22 and 'Q3 are shown :for the supply of steam or other heating fluid to the heating device 15, and a drain 23, 2st serves to carry away thel condensation therefrom. An outlet or conduit 25 may be provided for carrying awayair and non-condensible vapors from the heating device. Suitable means are provided for supporting the heating device in position Within the chamber 1 and are shown herein, as a series of brackets 26j The bottom Q0 of the chamber 1 as embodied is inclined from the sides or periphery toward the center or axis, a space or passageway being lc'lft tlua'ebctween an d the bottom of the heatingdevice l5. A gate 27,

'at the bottom of the chamber lfserves to discliarge the crystallized mass, in the case olf sugar making, Yfrom the chamber 1 into the mixe' and separator.

Within the body ot the chamber 1 are pro- License vided a series ot circulating rings 31,1which serve to separate the interior or central portion of the chamber 1 from the outer or peripheral portion thereof, the hotter fluid and vapors rising from the heating device flowing upwardly within the circulation rings and as the fluid cools and becomes relatively heavier, it is carried outwardly and flows downwardly between the circulating rings 31 and the walls of the chamber 1 back to the heating device to be reheated.' Said rings are arranged one above the other, andpreterably a plurality thereof in vertical alinement, but with horizontal spaces or openings 32 therebetween. By this means the lateral or radial. flow et the cooling juices toward the outer orperipheral portion of the chamber 1 is unimpeded at the various stages of the filling of the chamber 1, as crystallization proceeds and successive supplies of syrup or other liquid are added. Suitable supporting means are provided for the circulation rings such as brackets 33 andv standards 34, shown supported on the walls simplest and most natu al and mechanicallyv -ellicient circulation upwardly and downwardly of the fluid within the chamber 1 is provided and that non-interference of the oppositely flowing currents is effected. rlhere is likewise provided by the invention means for directing into the central portion of the chamber 1 the fluid heated by the bottom portion 16 and the side walls 1S of the' heating device 15, and also means for keeping separate this particular part of the ascending heated fluid and vapor from the cooler descending or returning fluid. The embodied form. ot such means comprises the ring or plate 36 arranged about but spaced away lrom the wall 18ct the heating device 15, thus leaving a space betweenring 3G and the wall .18 and also leaving a space or passageway between saidring or plate 36 and lating rings 31 that the upwardly traveling het fluid isy directedyinside the circulating rings. lReferring--togfthe form of such directive means illustrateilin Fig. 1, a ring or annular plate C37 isprovidcd flaring or opening downwardly to receive the up- 'wardly directed or t aveling fluid from between the wall 18 ot the heating device and said ring or plate 86 and directing said fluid inwardly within the circulating ring or rings. At the same time the downwardly descending cooler fluid is deflected or. directcd outwardly between said ring or plate 36 and the walls ot' the chamber 1 and ther two currents are kept separate Yfrom each other and .:lrcprevented 'trom batllingor neutralizing each 'at this point and thus largely slashes diminishing or negatiring the circulation and ctiicicncy of the apparatus. Said cooler downwardly traveling; ctn-rents of the Huid are thus permitted to flow uniinpeded to the underside o t the heating device 15u Where a large `portion thereof is drawn through lthe tubes 2l by. reason. of the u ward flow ci' `mixed liuids and vapor tl'u'ough and 'from the top ol" the heating dc- Tr: A. portion ot said cooler fluid, however, is highly heated ha' the .inclined bottoni :pl te or ioor lo the heating" device and travels upwardly and outwardly aloneF the upwardly inclined parts thereof and ub through the passageway between the Vall 18 and the ring Bti i; alreaey described into the interior ot circolatina` rings 3l. Referring to the 'forni ot device shown in allie' 3` it will he noted that the rino or plato 3u in verticaL alincrocnt7 or substantiallv so 'with the circulating* rings 3l, and 'that the heated luid from between thi ring 3G and they Walls 18 of the heating' device :hatY pass vertically up inside'the circulatingringl. ln Figi l the chamber l', is sl'iowu of greater diameter at the bottoni portion wht-rithe heating device is located. and ot' lesser diameter in the upper portion Where are the circulating rin ly this incaus the proportion or ratio or heating' suri'iacc to the cubical capacity or content for the duid to .f'aporatcd greatly increasci'l, which adds reife' much to the etliciency and factory operation ot thc device. The various other parte and coperatine: instruniental tics of amiaratus as alreadylv dcscribcd, and especially as shown in Figi). are designed to cooperate with this relation or proportion of the lieatingn surface with the cubical or liuid content ot the apparatus and there are embodied therewith the various features of construction and arrangement to secure thc advantages pointed out together with otnc advantages. Thus .not only' the greater eilicienct7 secured as just described but in connection therewith the inost adwintag'eous tion' or circulation of the 'liuidsh that the hotter ascending fluids within and the cooler descending fluids Without7 and also the ogipositely traveling currents are separated one from the other and cach directed along the nathcr in the direction conduciuff roost to the highest cicncv ot the device.

will be understood that a device hasbecn provided which embodies the various features oi invention and which realiz/les the objects and a drantages pointed out, togetherl with-other obit-cts and advantages. it will be understood also that the variations in structure herein shown are illustrative and cxpianatorv in character and not restrictive upon the im'cntion, and that changes 1n the constructiml and arrangcxncnt may be niadc,

from what is herein shown and described' strong upwithin the scope of the accompanying claims without departing from the principles of ythe invention.

'What I do claim as my invention and desire to secure by Letters Patent, is:

l. A vacuum evaporating apparatusginclnding in combination a closed Vacuum chamber, heatingmeans arranged at the bottoni part of said chamber, a circulating ring within said chau'iber and ot' less diameter 75 than the chamber., and means for directing the heated liquid from all carts oi' said heating means, including ythe sides and bottom thereof, within said cylindrical member.

vacuum evaporating apparatus including' in combination a closed vacuum chamber, heating means arranged at the bottoni part of said chamber, a circulating ring within said chamber and of less diameter than the chamber, and means for directing 'the heated liquid from all parts of said heating means, including` the sides and bottom thereof, within said cylindrical member, and

for separating said heated liquid from the cooler liquid returning to said heating ineens.

3i. vacuum evaporating apparatus including in combination a. closed vacuum chamber, heating means arranged at the bottoni part of said chamber, a circulating ring aborc said heating' means within Said chamher and of less diameter than the chamber and a partition openiat the bottom and encircling said heating means for keeping the heated liquid flowing from` said heating 10o :means from the returning cooler liquid flowing toward said heating means. y

4l. A vacuum evaporating apparatus including in combination a closed vacuum chamber, a heating device Within and near the bottom of said chamber with a passage wav for the tluid therebetween. a hollow cylindrical member within and of less diameter than said chamber and located 'above said heating device-,and means in said passage- 11.0

way for separating the heated liquid flowupwardly outside said heating deviceV yand thefcooler liquid returning thereto and for directing said heated liquid Within said hollow cylindrical. member.

5. A Yvaeuinn evaporating apparatus including ,in coinbinatlon a closed chamber, a heating device having upwardly directed tluid passages within and near the bottom' of said cliamber with a passage Way for the fluid between the heating device and the side walls and bottom of the chamber. a circulating; ring within said chamber above said heating device, and means for directing the heated liouid flowingupwardly outside said heating' device from beneath and around said heating device,` within said circulating ring' and for lic ping' said heated liquid and the cooler-liquial returningr troni the heating means separate 'troni each other. 13o

Cri

Y l l 6. A vacuum evaporating apparatus including in combination a heating device to said circulating ring.

TJA vacuum evaporating apparatus includingin combination a' heating device within and near the bottom of said chamber with a passage way around and beneath said heating device, a circulating ring within said chamberabove said heating device and means for directing heated fluid from around the outside and from beneath said heating device within said circulating ring and for directing the cooler fluid returning exterior-ly to said circulating ring beneath said heating device.

8. A vacuum evaporating apparatus including'in combination a chamber, a heating device of generally conical exterior' conformation and having upwardly directed passageways therethrough, said device being in inverted position within said chamber nearthe bottom thereof, a circulating ring within said chamber above said/ heating device, and m .:fns arranged about said heating device-an open at the bottom for directing the heated liquid from the underneath conical exterior of said device Within said circulating ring and for keeping said heated fluid separate from the cooler Huid returning exterior-ly to said ring to said heating device.

9. A' vacuum evaporating apparatus including in combination a chamber, a heating device of a generally conical exterior conformation and havi'ng upwardly directed passageways therethrough, said device being in inverted position within said chamber near the bottom thereof, a circulating ring within said chamber aboveA said heating device and means arranged around and separate from said heating device, and being open at the bottom, for directing the heated liquid from the underneath conical exterior of said devicewithin said circulating 'ring and for keeping said heated fluid separate from the ycooler fluid returning exteriorly to said ring to said conical underneath exterior of said heating device.

10. kA vacuum evaporating apparatus including in combination a chamber, a` heating device of a generally conical exterior conformation and having vupwardly directed passageways therethrough. said device being in inverted position within said lchamber near the bottom thereof with a passage around and beneath the heating device, a

circulating ring and for keeping said heated fluid separate from the cooler iluid vre'turning eXteriorly to said ring and around said heating device to the underneath part thereof. i i

11. A vacuum cvaporating apparatus including in combination a chamber of varying diameter having a part of lesser diameter above anda part ot greater diameter beneath, a circulating ring in said part of4 lesser diameter, a heating device in said portion of larger diameter and meansr for directing the heated liquid from about said heating device into the interior of said cir-A culating ring.

1:2. A vacuum e aporating apparatus including in combination a closed chamber, a heating device .located within and near the b ottom of said' chamber but with a fluid circulating space within said chamber walls beneath and horizontally around said heating device,.a circulating ring arranged within said chamber above said heating device to divide the interiorly hot ascending currents from the exteriorly'downwardly descending cooler currents, and a ring around and horizontally in alinernent with said heating device for receiving at its bottom the upwardly traveling hot liquid from the bottom and sides of said heating device and directing said liquidupuuirdly and within said circulating ring, while the cooler liquid travels downwardly exteriorly to said ring about said heating device and the upwardly and downwardly traveling currents are kept from intermingling and interfering with one another.

13. A vacuum evapurating apparatus including in combination a closed chamber, a

heating devicelocated within and near the bottom ot said chamber, said heating device `having an upwardly andoutwardly inclined bottoni, spaced apart from the chamber walls, a circulating i ng arranged within said chamber above sa-i'd heating device-to divide the intcriorly hot ascending currents from the cxti-,riorly downwardly (.lcscending' cooler currents, and a ring arranged around and horizontally in alinement with, but spaced apart from, said heating device for receiving at its bottom the hot fluid travel- .ing upwardlyfrom said bottom of the heating device and directing said fluid within said circulating ring while the cooler downwa rdly descending currents travel exteriorly to said ring around said heating device, and the upwardly and downwardly traveling currents are kept from intcriningling with one another. i

14. A vacuum cvaporating apparatus including in combination :i5/.closed chamber, a

incerte er heating device located within said chamber near the bottom thereof but spaced apart from said chamber, means for causing an upward circulation of hot iuid withln the 1 central part of said chamber and a cooler downward circulation near the walls of said chamber, and a partition about said heating device and spaced away both from said heating device and the chamber walls, for dividing the hot current ascending from the sides and bottom of said heating device from the cooler currents descending along the walls of said chamber.

15. A vacuum evaporating apparatus including in combination a closed chamber, a heating device within said chamber near the bottom thereof but spaced apart from said chamber, said heating device having an upwardly and outwardly inclined bottom and substantially vertical sides, and a partition arranged about said heating device and in substantial horizontal alinement therewith, but spaced apart therefrom and from said chamber wall and beingopen at the bottom for receiving within itself the hot upward currents rising from the bottom and sides of said heating device and keeping the downwardly descending cooler currents separate therefrom and directing them to the bottom of said heating device. V

16. A vacuum evaporatingapparatus including in combination a chamber .having its upper part of ilesser diameter and its lower .part of greater diameter, circulating culating rings, the cooler downward currents passing exteriorly to said circulating ring and heating device.

17. A vacuum evaporating apparatus in-I cluding in combination a chamber having its upper part of lesser diameter and its lower part of greater diameter, circulating rings located within said upper part, a heating` device located in said lower part, and means for directing the heated 'fluid from both the interior and exterior' of said heating device upwardly into the interior of said circulating rings, and a partition around the exterior of said heatingl device, spaced aparttherefrom and from the walls of said chamber, being open at the bottom and arranged to direct the hot fluid from about the exterior of said heating device within said circulatingv ring, the cooler downward currents passing exteriorly to said circulating ring and heating device.

In testimony whereof, l have signed my name to this specification, in the presence of two subscribing witnesses.

GEORGE STADE.

Witnesses z HENRY Hasrna, WOL-Drama HAUPT. 

